Convert picture to binary image. This is a professional image processing toolkit for Android, currently support standard/adaptive OTSU, adaptive FISHER, Sauvola and an improved Sauvola algorithms. More algorithms may be added in the future.

You can pick a picture from gallery, and then crop it, the picture will be binarized by selected mode (algorithm). Also support batch process, just select a folder of your phone, then all pictures (jpg or bmp format) will be binarized one by one. Binarization results will be saved into SDCARD, the result folder name is displayed in app title.